Materials Literature
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We have investigated the interfacial electronic structure of La0.6Sr0.4MnO3 (LSMO)∕SrTiO3 (STO)/LSMO heterojunctions utilizing the elemental selectivity of photoemission spectroscopy. The Ti 2p core-level spectra clearly show Ti4+ states and do not exhibit any indication of Ti3+ states in TiO2 layers irrespective of a…
Energy-loss spectra and inelastic excitation functions of $s{p}^{m}\phantom{\rule{0.3em}{0ex}}{\mathrm{CH}}_{x}$ stretching and mixed bending-lattice modes have been measured by high-resolution electron energy-loss (HREEL) spectroscopy for hydrogenated and deuterated polycrystalline diamond films. The comparison betwe…
A water-soluble chitosan (WSC)/chondroitin-6-sulfate (ChS) polyelectrolyte complex (PEC) is covalently immobilized onto the surface of poly(3-hydroxybutyric acid-co-3-hydroxyvaleric acid) (PHBV) membranes via ozone-induced oxidation and poly(acrylic acid) (PAA) graft polymerization. To characterize the modified membra…
We have studied the effect of oxide impurities on the formation of BaCl2 nanocrystals in Eu-doped fluorochlorozirconate glass-ceramic storage phosphors using x-ray absorption near-edge structure and x-ray diffraction analyses. It is found that annealing the glass with a relatively high level of oxide impurities causes…
An adaptive lens using electrically induced liquid crystal (LC)/monomer concentration redistribution is demonstrated. In the absence of an electric field, the LC/monomer mixture is homogeneously distributed. Application of an inhomogeneous electric field causes the LC molecules to diffuse towards the high field region…
Five bis(tert-butylnitroxide) diradicals connected by a silole (7 a-d) or a thiophene (12) ring as a coupler were studied. Compound 12 crystallizes in the orthorhombic space group Pna2(1) with a = 20.752(5), b = 5.826(5), and c = 34.309(5) A. X-ray crystal structure determination, electronic spectroscopy, variable-tem…
Abstract Summary: The optimum mixing and molding conditions for processing of styrene‐butadiene‐styrene (SBS) triblock copolymer filled with carbon black (CB) or polyaniline doped with dodecylbenzene sulfonic acid (Pani.DBSA) were determined. The mechanical performance of SBS/CB and SBS/Pani.DBSA composites were chara…
Abstract Two new second‐order nonlinear optical coordination polymers, zinc cadmium tetraselenocyanate ([ZnCd(SeCN) 4 ] n , 1 ) and cadmium mercury tetraselenocyanate ([CdHg(SeCN) 4 ] n , 2 ), have been synthesized by reactions of self‐assembly. Their structural, optical, and physicochemical properties were characteri…
This exposition describes a novel heat transport model and an underlying unified theory emanating from the physics of the Boltzmann transport equation which acknowledges simultaneously the coexistence of that termed as slow processes (at low energies) and fast processes (at high energies) as heat carriers while descri…
We have investigated resonant Raman scattering (RRS) and photoluminescence of ZnO inverse opal prepared by electrodeposition. The intensities of both 577cm−1 Raman scattering and green emission get weaker after aging or UV laser irradiation. The RRS and green emission intensities are highly correlated for different sa…
The preferential penetration of a liquid metal along grain boundaries (GBs) in polycrystalline metals is a well-known phenomenon. Gallium-decorated GB networks in rolled aluminium alloys have been visualized three-dimensionally using the high-resolution synchrotron radiation computer tomography (SRCT). The distributio…
A heart of gold: The reaction of silylated arsenic derivatives with gold(I) phosphine complexes produces gold–arsenic clusters, such as [Au19(AsnPr)8(dppe)6]3+ (dppe=Ph2P(CH2)2PPh2). This complex cation (see picture; Au gold, As blue, P violet) can be described as two crossing Au9As4 chains (red and green), and contai…
Poly(vinyl alcohol) (PVA) nanofibers containing bimolecular ferritin nanoparticles exhibited the enhancement of elastic modulus as compared to pure PVA nanofibers due to chemical interactions between the ferritin and the PVA matrix. The elastic modulus of the nanofibers was measured using a three-point bending test em…
Carrier transport characteristics in the chiral nematic phase of 2-[5-(4-[(S)-2-methylbutoxy]phenyl)-3-methyl]-2′′′-propyl-2:5′-2′:5′′-2′′:5′′′-quaterthiophene, a liquid-crystalline semiconductor (see picture), are determined with a time-of-flight technique. A non-dispersive transient photocurrent is observed in the c…
Optoelectronic characterization of transparent and conducting single-wall carbon nanotube thin films is reported. By eliminating the influence of voids and bundle-bundle interactions within the effective medium theory, we show that the complex dielectric response of the individual nanotube varies with its density in t…
We fabricated metal-insulator-metal (MIM) thin film capacitors with Bi1.5Zn1.0Nb1.5O7 (BZN) dielectric films. The BZN films were deposited at room temperatures by pulsed laser deposition and annealed below 200°C which is compatible with the used polymer-based substrates. The dielectric constant of BZN films increases…
The early stage of barium titanate (BaTiO 3 ) nanoparticle formation is investigated by in situ X‐ray diffraction (XRD) and X‐ray absorption near‐edge structure (XANES) using synchrotron radiation. BaTiO 3 nanoparticles are synthesized via dissolution of barium hydroxide octahydrate and hydrolysis of titanium (IV) iso…
Abstract The synthesis, characterization, and structure regulation of hyperbranched polycarbosiloxane with dendritic boron cores were realized in this paper. First, dendritic boron core was synthesized via hydroboration with borane dimethylsulfide and bis(allyloxy)dimethylsilane. Then, the hyperbranched polycarbosilox…
One-dimensional (1D) CdSe nanostructures, including nanowires, nanotubes, nanorods, nanobelts, and even nanostructures resembling saws and tree branches, have been synthesized by sublimation of CdSe powders under various experimental conditions. These 1D CdSe nanostructures were characterized by scanning electron micr…
The onset of cracking during drying of alumina suspensions cast onto a substrate has been studied experimentally. It is shown that the capillary pressure would impose a compressive stress on the particle array and cannot itself cause cracking. Based on experimental observations, it is proposed that the driving force f…